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- Title
RAPID AMMONIUM UPTAKE BY FRESHWATER PHYTOPLANKTON.
- Authors
Suttle, Curtis A.; Harrison, Paul J.
- Abstract
A natural assemblage of freshwater phytoplankton was removed from an oligotrophic lake and grown at N:P supply ratios of 5:1, 15:1 and 45:1 (by atoms) in semi-continuous cultural. After a minimum of 31 days at an average daily growth rate 0.5 d[SUP-1], experiments were conducted examining the time-course of saturated ammonium uptake rates. Cultures grown under the two lowest N:P supply ratios demonstrated greatly elevated initial, specific uptake rates for ammonium and were able to sequester between 7 and 21% of their daily N requirement in less than 5 min. The initial rates declined rapidly but were followed by a subsequent increase and decrease over a 120 min period.
- Subjects
FRESHWATER phytoplankton; AMMONIUM; LAKES
- Publication
Journal of Phycology, 1988, Vol 24, Issue 1, p13
- ISSN
0022-3646
- Publication type
Article
- DOI
10.1111/1529-8817.ep10986642